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DoorBird D21 Serie Manuel D'installation page 10

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5
ASSEMBLING THE MOUNTING HOUSING
Remove the front panel carefully using the screw driver provided with the device from the mounting
housing (backbox). You can find detailed drawings and measurements of the device in the corresponding
datasheet.
If you must drill holes in a wall, insert screws into a wall or lever up a wall, ensure that
no cables or mains (gas, water, etc.) are to be found in the wall.
Mounting the surface-mounted housing
Place the rubber seal for the cable entry on the
mounting opening.
Important note for cavity mounting (e.g. in pedestals and mailboxes):
To protect the electronic units, please
ensure that the technical components are
protected against dripping and running
water caused by condensate or entering
the mounting space through openings.
To protect the electronic units, ensure
that the mounting space inside is not
accumulating water.
6
POWER SUPPLY
The device is powered via PoE (Power over Ethernet) using a network cable because the network connection
of the device is exclusively via LAN.
POWER SUPPLY AND NETWORK CONNECTION USING POE
(POWER OVER ETHERNET)
To power the device via a PoE-Switch (e.g. D-Link DGS-1008P) or PoE-Injector (e.g. DoorBird Gigabit PoE
Injector A1093) in accordance with the PoE standard IEEE 802.3af Mode A, the four wires bearing the
numbers 1, 2, 3 and 6 of a Cat.5 cable or better are to be used. Make sure to use a high-quality Cat.5 network
cable or better and with proper shielding (Screened Foiled Twisted Pair (S/FTP or SFTP)) whereby the shield
is connected to the outer metal shield of the RJ45 plug (8P8C). If you use PoE as a source of power the four
wires for PoE then simultaneously form the data link.
The device won't start if your PoE-Switch/PoE-Injector does not support the PoE Standard IEEE 802.3af Mode A
(see Diagnostic-LED and Diagnostic-Sounds).
1. Disconnect the PoE-Switch or PoE-Injector from the power grid.
2. Run the network cable to the installation location of the device.
Further information on PoE can be found here: http://www.doorbird.com/de/poe
10
Rubber seal for
cable entry
Cover for unused
openings
Pierce through the
middle of the rubber
seal using a screwdriver.
Sufficient air circulation must be ensured,
as well as unobstructed drainage of water
at the base of the installation.
Failure to do so will result in warranty
being declined.
Feed all cables and
wires that you want to
connect to the device
through the rubber seal.

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